Syntheses for 2-amino and 2-mercapto-2<i>H</i>-1,4-benzoxazin-3(4<i>H</i>)-one and 2<i>H</i>-1,4-benzothiazin-3(4<i>H</i>)-one as aza and thio analogues of the natural product<i>blepharigenin</i>
作者:Michael Kluge、Dieter Sicker
DOI:10.1002/jhet.5570330613
日期:1996.11
2-Amino-2H-1,4-benzoxazin-3(4H)-one 3, 2-amino-2H-1,4-benzothiazin-3(4H)-one 4, 2-mercapto-2H-1,4-benzoxazin-3(4H)-one 7, and 2-mercapto-2H-1,4-benzothiazin-3(4H)-one 8 representing aza and thio analogues of the natural product's aglucone Blepharigenin (2-hydroxy-2H-1,4-benzoxazin-3(4H)-one) from Gramineae and Acantnaceae species have been synthesized for the first time from their 2-bromo precursors
2-氨基-2- ħ -1,4-苯并恶嗪-3(4 H ^) -酮3,2-氨基-2- ħ -1,4-苯并噻嗪-3(4 H ^) -酮4,2-巯基-2- ħ -1,4-benzoxazin-3(4 H)-one 7和2-mercapto-2 H -1,4-benzothiazin-3(4 H)-one 8代表天然产物的葡糖苷Blepharigenin的氮杂和硫代类似物(禾本科和菊科物种的2-羟基-2 H -1,4-苯并恶嗪-3(4 H)-one)首次由其2-溴前体合成1和2。尝试类似地制备7和8的4-羟基衍生物,它们代表自然存在的环状异羟肟酸的新硫代类似物2,4-二羟基-2 H -1,4-苯并恶嗪-3(4 H)- , 失败了。